Safety gas pilot with draft guard



Jan. 8, 1952 R p, HUMPHREY 2,581,590

SAFETY GAS PILOT WITH DRAFT GUARD Filed Apr i1 7. 1950 IN V EN TOR.

Patented Jan. 8, 1 952 Robert P. Humphrey, Kalamazoo, Mich'.,- assi'gnor to General Gas Light Company, Kalamazoo,

. Mich.

Applicationhpril 7, 1950; Serial No. 154,653

This invention relates to improvements in safety gas pilot with draft guard.

The main objects of this invention are:

First, to provide a safety gas pilot which is highly efilcient and is not likely to become clogged or inoperative.

Second, to provide a gas pilot unit which is not likely to be extinguished bydrafts.

Third, to provide a gas pilot unit having these advantages which can be installed as a unit in operative relation to a gas burner.

Fourth, to provide a structure having these advantages which is economical in its parts and at the same time strong and durable.

v Objects relating to details and economies of the invention will appear from the description to follow. The invention is pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a perspective view of a gas burner with my pilot burner unit associated therewith, the valve mechanism being shown conventionally.

Fig. 2 is an enlarged fragmentary view in sections through the main burner.

Fig. 3 is an enlarged fragmentary view partially in vertical section of a commercial embodiment of my pilot burner.

Fig. 4 is a fragmentary plan view of the pilot burner unit of my invention.

In the accompanying drawing, l represents the main burner which is provided with a bunsen tube or body member 2 with which the gas nozzle 3 is operatively associated. 4 represents the gas supply valve. The details of this valve form no part of my present invention except that the valve is of a type which is controlled by a thermocouple and which controls the supply conduit 5 of the pilot burner. In the embodiment o'f iny inventionillustr'ated the thermocouple designated generally by the numeral 6 is operatively connected to the valve through the connection conventionally shown at 1.

The pilot burner of my invention as illustrated comprises a burner tube or body member which is mounted on the bracket 9 attached to the lug or stud II] on the burner. The bracket has vertically spaced support members II and I 2, the tubular body member or burner tube I3 being fixedly mounted on the top member of the bracket. The supply nozzle I4 is disposed in alignment with the burner tube and is mounted on the bottom bracket member II. The burner head I 5, which in this embodiment illustrated is domed. is sleeved the burner tube It and 7 Claims; 01. 1 58-115) is provided with an integraloutwardly extending annular flange 6. The burner tube and the burner head have longitudinal registering slots I! and I8 respectively. The slot 18 in theburner head extends to the top of the head. The burner head is provided with a pilot jet orifice [9 disposed in the side thereof and angularly spaced relative to the slot I8, preferably as illustrated. The burner tube has a thermocouple jet orifice 20 registering with the slot H and preferably in spaced relation to the lower end of the slot II.

The diagonal slot 21 opens to the pilot jet orifice l9 and extends downwardly therefrom and relatively crosswise of the slots I1 and ill, the crossing point being in the plane of the flange I6. The flange has a radial slot 22 extending from its periphery and opening to the longitudinal slots. It will be noted that the flange I6 is spaced above the thermocouple jet orifice 20 and spaced below the pilot jet orifice l9. The thermocouple 6 is disposed in alignment With the jet orifice 20 while the pilot orifice I9 is directed toward the burner, the burner illustrated having a plurality of ignition jet orifices 23 in the side thereof aligned with the pilot orifice l9 and adapted to direct gas toward the pilot orifice or into the path of the pilot orifice fiame.

The flame from the thermocouple jet orifice 2U heats the thermocouple which is connected to the control valve so that while heated the control valve for the pilot burner is held in open position;

however, in the event of the pilot burner being extinguished the thermocouple cools and cuts off the supply of gas to the pilot burner. The valve mechanism by which this is accomplished is not illustrated as usable thermocouple controlled valves are known to those skilled in the art and as stated, the detail of thevalve forms no part of my present invention. 1

With the parts formed and arranged as illustrated neither the thermocouple jet or the pilot burner jet are likely to be extinguished but should one of them be extinguished the other is promptly relighted. The connections of the jet orifices by means of the slots and the opening of the slots to the outside of the burner insures effective combustion and minimizes the likelihood of either jet being extinguished. The flange l6 as associated with the slots and jet orifices is highly effective in preventing the extinguishing of the jets by drafts of air.

I have illustrated and described my invention in a highly practical embodiment thereof. I have not attempted to illustrate or describe other can bodiments or adaptations as it is believed that this disclosure will enable those skilled in the art to embody or adapt my invention as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A pilot burner comprising a burner tube adapted to be; associated with a gas supply nozzle, and a domed burner head sleeved upon said tube and having an integral annular outwardly extending flange at its inner end, said tube and burner head having registering longitudinal gas outlet slots therein; the slot in the burner head extending to the center thereof, the slot in the burner tube extending substantially below said flange, said burner head having a burner pilot jet orifice in the side thereof disposed at substantially 90 angularly spaced relation to said longitudinal slot in said head, said burner tube having a thermocouple jet orifice opening to said longitudinal slot therein and spaced from said flange and from the inner end of the slot, said burner tube and head having registering diagonal slots therein extending from said burner jet orifice in said burner head and crossing the longitudinal slot in substantially the plane ofv the flange, said guard having a radial slot therein opening to said slots in said tube and head.

2. A pilot burner comprising a burner tube adapted to be associated with a gas supply nozzle, and a burner head sleeved upon said tube and having an integral annular outwardly extending flange at its inner end, said tube and burner head having registering longitudinal gas outlet slots therein, the slot in the burner tube extending substantially below said guard, said burner head having a burner pilot jet orifice in the side thereof disposed in angularly spaced ;relation to said longitudinal slot in said head, said burnertube having a thermocouple jet orifice opening to said longitudinal 'slot therein and spaced from said flange, said burner'head having a slot therein extending from said burner jet orifice in said burner head to the longitudinal slot.

3. A gas pilot burner comprising a burner tube, a burner head on said tube, and an annular outwardly extending flange at the inner end of said head, said tube and head having registering longitudinal gas outlet slots extending above and below the flange, said head having a burner pilot jet orifice vertically spaced from said flange and angularly spaced from said longitudinal slot, said burner tube having a thermocouple jet orifice below and spaced from said flange and opening to said longitudinal slot, said head and tube having a diagonal slot crossing the longitudinal slot in substantially the plane of said flange, the flange having a radial slot opening to said longitudinal and diagonal slots.

4. A pilot burner comprising a burner tube adapted to be associated with a gas supply nozzle, and a burner head on said tube, said tube and burner head having registering longitudinal gas outlet slots therein, said burner-head having a burner pilot jet orifice disposed in angularly spaced relation to said longitudinal slot in said head, said burner tube having a thermocouple .jet orifice opening to said longitudinal slot therein, and an outwardly extending flange disposed between said jet orifices, said burner havorifice and" said longitudnal slot.

5. A gas pilot burner comprising a burner tube, a burner head mounted on said tube, said tube and head having registering longitudinal gas outlet slots, said head having a burner pilot jet orifice Vertically spaced from said guard and angularly spaced from said longitudinal slot, said burner tube having a thermocouple jet orifice opening to said longitudinal slot, a slot opening to the longitudinal slot and to said burner jet orifice, and an outwardly extending flange disposed between said jet orifice and inspaced relation to each of them.

6. A gas pilot burner comprising a burner tube provided with a burner head, said tube'and head having communicating gas outlet slots, said head having a burner pilot jet orifice connected to said slot therein, said burner tube having a thermocouple jet orifice opening. to said slot therein, and an outwardly extending flange disposed between said jet orifices and in spaced relation to each of them.

7. A gas pilot burner comprising a burner tube, a burner headmounted on said tube,- said tube and head having connecting longitudinally extending gas outlet slots, and an outwardly'extending flange at the juncture of said slots, said head having a burner pilot jet orifice vertically above said flange and angularly spaced from said longitudinally extending slot in said head, said burner tube having a thermocouple jet orifice below said flange and opening to said longitudinally extending slot therein, there beinga slot in said head above said flange opening to the said longitudinally extending slot of the head and to said burner jet orifice.

ROBERT P. HUMPHREY.

REFERENCES CITED The following references are of record iri'the file of this patent:

. UNITED STATES PATENTS Guelson Aug. 8, 194fl 

